XF 1.3 Facebook Connect issue on IE

I have been testing my website's Facebook Connect. When you sign up via Chrome in FB it seems to work well – you sign up through FB and it takes you to the page seen in the photo below.
But, when you try to sign up via FB in IE it does not bring you back to the attached page – it takes you straight to the home page. So, in IE, you do not get to ‘Create a New Account’ or ‘Associate Existing Account’. (You only get to the attached page if you hit ‘Login with Facebook’ after you are taken to the homepage, after being brought back to the website from FB).

Edit: Just tried from Chrome after ensuring I was signed out from both FB and the forum, and it worked the exact same way. No being taken back to the homepage of the forum (which I did experience earlier in Chrome).

Could this kind of stuff be related to not having signed out from FB before? (I have to admit I loathe FB, and barely ever use it. I remain signed in, but am inactive on it for weeks in-between I think. I'm actually pondering simply deleting my account there altogether, as I do not trust that site one bit (Hi NSA!)).

Edit: Just tried from Chrome after ensuring I was signed out from both FB and the forum, and it worked the exact same way. No being taken back to the homepage of the forum (which I did experience earlier in Chrome).

Could this kind of stuff be related to not having signed out from FB before? (I have to admit I loathe FB, and barely ever use it. I remain signed in, but am inactive on it for weeks in-between I think. I'm actually pondering simply deleting my account there altogether, as I do not trust that site one bit (Hi NSA!)).